本文回顾性分析了1989年10月至1990年10月间89例产程潜伏期延长,并与同期105例无潜伏期延长者对照比较,发现耻骨联合高度≥6cm 是潜伏期延长的主要原因.胎儿体重≥3500g,头盆评分≤7分等也是造成潜伏期延长的因素.本文提出及时正确识别临产,对处理潜伏期延长有重要意义. This article retrospectively analyzed 89 cases of labor between October 1989 and October 1990, prolonged incubation period, compared with 105 cases of non-latency extension of the same period, found that the pubic symphysis height ≥ 6cm is the main reason for prolonged latency. Fetal weight ≥ 3500g , Scalp score ≤ 7 points is also contributed to the extension of latency factors.This paper proposed timely and correct identification of labor, the processing latency is of great significance.